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首页> 外文期刊>International Journal of Heat and Mass Transfer >Study of heat-transfer characteristics on the fin of two-row plate finned-tube heat exchangers
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Study of heat-transfer characteristics on the fin of two-row plate finned-tube heat exchangers

机译：两排板翅片管式换热器翅片传热特性研究

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摘要

The present study applies the experimental and numerical inverse methods to determine the average heat transfer coefficient h and heat transfer coefficient under the isothermal situation h~(iso) on a vertical square fin of the two-row plate finned-tube heat exchangers with four circular tubes for the staggered arrangement and various air velocities and fin spacings. These tubes may not have the same temperature. The experimental fin temperature measurements, ambient air temperature and air velocity are obtained from the present small wind tunnel. Due to the non-uniform distribution of the heat transfer coefficient, the square plate fin is divided into several sub-fin regions before performing the inverse scheme, and the average heat transfer coefficient in each sub-fin region is assumed to be unknown. The results show that the h and h~(iso) values increase with the air velocity and fin spacing for the staggered arrangement. In order to validate the reliability of the present results, the h~(iso) value is compared with the existing correlations for the staggered arrangement.
机译：本研究运用实验和数值逆方法确定了四行圆板双排板翅片管式换热器的垂直方翅片的平均传热系数h和等温情况下的传热系数h〜（iso）。交错排列的管以及各种风速和翅片间距。这些管的温度可能不同。实验翅片温度测量，环境空气温度和空气速度是从当前的小型风洞获得的。由于传热系数的不均匀分布，方形翅片在执行逆方案之前被分成几个子翅片区域，并且假定每个子翅片区域中的平均传热系数未知。结果表明，对于交错布置，h和h〜（iso）值随风速和翅片间距的增加而增加。为了验证当前结果的可靠性，将h〜（iso）值与交错排列的现有相关性进行比较。

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